上传文件至 'w5'

w5/Retangle.java

@@ -0,0 +1,7 @@
+public class Retangle extends Shape{
+    @Override
+    protected void draw(){
+        System.out.println("Retangle is drawn.");
+    }
+    
+}

w5/Shape.java

@@ -0,0 +1,4 @@
+abstract class Shape{
+    Shape shape;
+    abstract void draw();
+}

w5/Truck.java

@@ -0,0 +1,9 @@
+public class Truck extends Vehicle{
+    protected Truck(String name){
+        this.s=name;
+    }
+    @Override
+    public void run(){
+        System.out.println(s+" is running");
+    }
+}

w5/Vehicle.java

@@ -0,0 +1,4 @@
+abstract class Vehicle {
+    String s;
+    abstract void run();
+}